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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e06e4bd6ae2cde772494cc73c0693944b9d3093c3d772d54f502b364b169beef' 
  AND token = 'T1VtLhQAk7bqDacK8PXiEJW3WiO7bsr6kzB8gDjq0M0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}